server {
    listen       80;
    server_name  localhost;


    location / {
      root   /app;    
      index  index.html;
      try_files $uri $uri/ /index.html;
    }
}

server {
  listen 80;
  listen 443 ssl http2;

  server_name www.demo.com;

  if ($ssl_protocol = "") { return 301 https://$host$request_uri; }


  # 前端
  location / {
      root /data/wwwroot/www;
      index  index.html;
      try_files $uri $uri/ /index.html;
    }

   # 后台
   location ^~/admin {
      alias /data/wwwroot/admin;
      try_files $uri $uri/ /admin/index.html;
    }

  # 数据接口
  location /api {
     proxy_pass http://127.0.0.1:5000;
  }
}

# 对html文件限制缓存
location ~ .*\.(html)$ {  
  # 不缓存
  # add_header Cache-Control no-store;  
  # 或者用 协商缓存
  add_header Cache-Control no-cache;
  add_header Pragma no-cache; 
}